I use to have a 1Ds Mark I which I sold to get a 1D Mark II as I needed faster FPS and ISO performance, but I always missed the resolution and IQ of my 1Ds. Now I am ungrading to 1D Mark III. My question, albeit a bit difficult to answer at this stage, is, due think that IQ and resolution of MARK III can be a match for the 1Ds Mark I at ISO